The Mona Lisa Vanishes

123456789
Across
  1. 2. Comes from melted sand
  2. 4. Used to put pictures in it and hang it on the wall.
  3. 5. Someone who steals
  4. 6. Made from trees
  5. 7. Place that puts things on display
  6. 8. Someone who paints
Down
  1. 1. Room used for storage
  2. 3. Another word for security
  3. 6. Older girl
  4. 9. This is a place famous for pasta and pizza